1. Daresbury ESS In-Kind Contributions
Peter McIntosh
ASTeC Technical Division Head
ESS Collaboration Board Meeting
Daresbury Laboratory
Wednesday 1st February 2017

2. Beam Transport Modules Delivery Scope
Technology Department & ASTeC
To design, procurement and assemble;
2 Prototypes
3 Test Chambers
75 LWUs
52 Beam pipe modules
2 Differential pumping systems
3 mobile installation cleanrooms
Over the next four years we have been asked to delivery …

3. Linac Warm Unit (LWU) Sections
BPMs
BPMs
BSM
BCT
BIF WS WS
BPMs
BPMs
IPM
STFC will integrate all 75 LWU’s

4. BTM Update Highlights 1st prototype already shipped to ESS.
2nd prototype complete ready to ship.
1st batch of beam pipes completed.
Mobile cleanroom tender has now closed, awaiting award letters to go out.
Issues
ESS vacuum Tender has now been agreed by STFC and will be published soon – will push first LWU production vessel delivery back from Jan to Mar17.
Other key status points/work in progress:
2nd CDR to cover the Dumpline, Dogleg and A2T area will take place in end of March early April, date TDB.
BTM technical annex still awaiting final stage approval.

5. BTM Delivery
1st Prototype LWU at ESS
2nd Prototype LWU at Daresbury

6. High Beta Cavity Delivery Scope
Niobium procurement: STFC to procure the high RRR Niobium for the high-β elliptical dressed cavities in agreement with the SRF collaboration for the ESS linac.
Cavity fabrication of the 84 (+ 4) high-β elliptical dressed cavity in industry including:
Cavity fabrication.
Chemical processing.
Heat treatment.
Vacuum processing.
High pressure rinsing.
Field flatness and frequency tuning.
Assembly of RF antenna and isolation valve in cleanroom.
Shipment of dressed cavities to STFC.
Procedure Qualification and Training:
A qualified test procedure to be developed and implemented.
A QA/QC system for individual tests in accordance with ESS policies.
Trial tests to be performed and performance targets verified.
Staff training in procedures and processes.

7. Elliptical Cavities Universal Cryomodule: Medium β = 0.67
Cryomodules are expensive and difficult to fabricate.
Pick cavity  and number of cells:
Optimize power transfer
Optimize length
Power in couplers is limited to 1200 MW (peak).
Cavity and cryomodule design performed by CEA-Saclay (France).
Medium β = 0.67
6 cell cavities
Cavity length = 0.86 m
36 cavities in 8 cryomodules
INFN-Milan to Procure and Test
Maximum peak RF power = 800 kW
High β = 0. 86
5 cell cavities
Cavity length = 0.92 m
84 cavities in 22 cryomodules
ASTeC and TD to Procure and Test 88 x high beta cavities
Maximum peak RF power = 1100 kW

8. High Beta Cavities Update
Highlights
HBC testing Infrastructure critical path activities are still on schedule
Cryostat manufacture on schedule
Received first cryoplant components from Air Liquide Jan’17
Magnetic shield manufacture is on schedule
Niobium tender is live, expect to close in mid-Mar’17
Achieved ISO5 in mock-up HBC insert cleanroom; confident achieving ISO4 target operationally.
Issues
Major risk mitigation (change request) approved by PMB to allow undressed cavity testing to validate BCP in industry – not in original STFC delivery plan – awaiting formal ESS approval.
STFC procurement delays impacting delivery timescales:
OJEU procurements on long-lead items – Nb and cavity procurements
Significant financial risk still open due to large procurements (exchange rates, Nb market variation).
Other key status points / work in progress:
Final cavity procurement specification still being developed with CEA Saclay & ESS
Quality control details for niobium supply and cavity production is still in development with ESS, CEA and INFN
Standardisation of design reviews across infrastructure work packages in progress
HBC technical annex still awaiting final stage approval.

9. SRF Hall – Cleanroom Layout
BCP not included in ESS scope
He Compressor House
Offices upstairs
Cavity Goods-In & Out downstairs
Thin Film Lab
Crab
Lab
VTF
Cleanroom
Cryo-plant

10. HBC Test Infrastructure